Nickodeamus Yurkofsky first appears reading Advanced Mechanics for the Mad as Agatha makes her grand appearance on the Castle Wulfenbach in her pink unmentionables. This suggests he is a Spark, but there is no evidence either way as yet.

As do the other students, he raises a dubious eyebrow at Princess Zulenna's haughty treatment of Agatha's alleged parentage and talents. He is described as being "one of the nicer students", and cheerfully comments about how jumping out of a nice safe airship wearing a little blimp and a pair of wings into a nest of Slaver wasps is stupid, just before doing it anyway .